Title:
力率補正回路
Document Type and Number:
Japanese Patent JP2007505598
Kind Code:
A
Abstract:
A power factor correction circuit comprises first and second ac inputs (I 1 ), (I 2 ) for receiving an ac voltage. A rectifier ( 104 ) has first and second rectifier inputs (I 3 ), (I 4 ) each connected to a respective ac input (I 1 ), (I 2 ), and first and second rectifier outputs ( 05 ), ( 06 ) for outputting a dc voltage. Two capacitor banks (C 1 ), (C 2 ) are connected in series between the rectifier outputs ( 05 ), ( 06 ). A choke (L 1 ) is connected between ac input (I 1 ) and rectifier input (I 3 ). A bi-directional switch ( 106 ) is connected to the rectifier inputs (I 3 ), (I 4 ) and receives a control signal for controlling the switching of the bi-directional switch ( 106 ) so as to control the charging and discharging of the choke (L 1 ) through the rectifier ( 104 ). A mid-point between the capacitor banks (C 1 ), (C 2 ) is selectively connectable, or connected, to the ac input (I 2 ) according to the magnitude of the ac voltage.
Inventors:
Regian
Application Number:
JP2006525871A
Publication Date:
March 08, 2007
Filing Date:
August 10, 2004
Export Citation:
Assignee:
The BOC Group plc
International Classes:
H02M7/12; H02M1/00; H02M1/42
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda